JPH1174134A - Electromagnetic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely bond and fix a core to a coil bobbin by forming the bonding area of the coil bobbin to the end face of the core large by forming a notched section for bonding, to which a bonding agent is applied by exposing the end faces of the core at parts of the engaging sections of the coil bobbin. SOLUTION: A coil bobbin 13 is integrally formed of a synthetic resin and has a core passing section 31 at the center, a cylindrical winding section 22 for winding a coil 12 on the periphery, and annular flange sections 23 and 24 at both the ends of the winding section 22. On the external surface of a flange section 23, a pair of engaging sections 25 which are engaged with both the end faces of a core 14 is formed, and at the central part of each engaging section 25, a pair of notched sections 26 for bonding is formed for exposing the end faces of the core 14. At the same time, a partitioning projecting section 27 is formed between the notched sections 26. In addition, ribs 28 are formed across the flange section 23 and engaging sections 25 on both the sides of each notched section 26, so that the ribs 28 form a space for bonding agent receiving sections 29 corresponding to the respective notched sections 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electromagnetic device having a coil, a coil bobbin, and an iron core, wherein the coil bobbin and the iron core are bonded and fixed with an adhesive.

[0002]

2. Description of the Related Art Conventionally, in an electromagnetic device such as a ballast for a discharge lamp, a coil 1 is wound around a coil bobbin 2 and this coil bobbin 2 is inserted into an iron core 3 as shown in FIG.

The coil bobbin 2 is provided with a winding portion 4 around which the coil 1 is wound.
6 are formed. An engagement portion 7 that is engaged with the end surface of the iron core 3 is formed at one of the flange portions 5 at a position protruding from the end surface of the iron core 3.

[0004] In order to suppress the generation of noise due to vibration between the coil bobbin 2 and the iron core 3, an adhesive 8 is applied between the tip of the engaging portion 7 and the end face of the iron core 3, And the iron core 3 are bonded and fixed with an adhesive 8.

[0005]

However, electromagnetic equipment such as a ballast for a discharge lamp is made thinner, and depending on the iron core 3 combined with the coil bobbin 2, the tip of the engaging portion 7 and the end face of the iron core 3 may not be formed. Since the portion of the adhesive 8 to be applied is narrow, the application of the adhesive 8 is difficult, and the adhesive 8 is easily protruded from the upper surface of the iron core 3, and the adhesive 8 cannot be sufficiently applied. There is a problem that the bonding area of the adhesive 8 to the end face is small and the bonding and fixing are not reliable. If the adhesive 8 is applied to the upper surface of the iron core 3, the adhesive 8 may not fit in the case accommodating the electromagnetic device, so that the protruding adhesive 8 needs to be removed, and there is a problem that it takes time and effort.

In order to widen the distance between the tip of the engaging portion 7 and the end surface of the iron core 3, the amount of protrusion of the engaging portion 7 from the flange 5 is reduced. There is a disadvantage that it is not possible to secure a sufficient amount of engagement with.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electromagnetic device which can easily apply an adhesive and can securely adhere and fix a coil bobbin to an iron core.

[0008]

According to a first aspect of the present invention, there is provided an electromagnetic apparatus comprising: a coil; a coil bobbin around which the coil is wound; and an iron core into which the coil bobbin is inserted. In the electromagnetic device fixed in the above, the coil bobbin is a winding portion around which the coil is wound, a flange portion formed at both ends of the winding portion, a part of which protrudes from an end surface of the iron core, An engaging portion formed on the flange portion protruding from the end surface of the iron core and engaged with the end surface of the iron core, and a cutout formed in a part of the engaging portion to expose the end surface of the iron core and the adhesive And a notch for adhesion to which is applied.

[0009] Since the notch for bonding to apply an adhesive is formed by exposing the end face of the iron core to a part of the engaging part of the coil bobbin, a sufficient amount of engagement between the engaging part and the end face of the iron core is ensured. Above, the adhesive can be easily applied from the notch for bonding to the end face of the iron core, and the bonding area of the adhesive to the end face of the iron core increases, so that the adhesive fixation between the coil bobbin and the iron core is ensured.

According to a second aspect of the present invention, there is provided the electromagnetic device of the first aspect, wherein the engaging portions are respectively formed in the flange portions protruding from both end surfaces of the iron core, and the notches for bonding are formed in the respective engaging portions. Is what is being done.

[0011] Since the engaging portions to be engaged with both end surfaces of the iron core are formed, and the notches for bonding are formed in each of the engaging portions, the adhesive fixation between the coil bobbin and the iron core becomes more reliable, and the application of the adhesive is performed. Even if there are many locations, it can be easily handled.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the electromagnetic device of the present invention will be described below with reference to FIGS.

FIG. 1 is an exploded perspective view of an electromagnetic device, and FIG.
FIG. 2 is a front view of the electromagnetic device.

In the figure, reference numeral 11 denotes an electromagnetic device main body, which is provided with a coil 12, a coil bobbin 13, and an iron core 14.

The coil 12 is formed by winding a predetermined number of turns around an insulating coating on a coil bobbin 13, and both ends of the winding are connected to pins 34 of the coil bobbin 13, which will be described later.

The coil bobbin 13 is made of a synthetic resin having an insulating property and is integrally formed.
Is formed and has a cylindrical winding portion 22 around which the coil 12 is wound, and annular flange portions are provided at both ends of the winding portion 22.
23 and 24 are formed respectively.

A pair of engaging portions 25 which are engaged with both end surfaces of the iron core 14 are formed on the outer surface of the one flange portion 23 so as to correspond to positions protruding from both end surfaces of the iron core 14. . A pair of bonding notches 26 for exposing the end surface of the iron core 14 are formed at the center of each engaging portion 25, and a partitioning protrusion 27 projects between the pair of bonding notches 26. Is formed. Ribs on both sides of each adhesive notch 26
28 are formed over the flange portion 23 and the engaging portion 25, and the ribs 28 allow the adhesive receiving portions 29 corresponding to the respective notches 26 for bonding.
Is formed.

The other flange 24 has a pair of engaging portions 30 which are engaged with both end surfaces of the iron core 14 at positions corresponding to positions protruding from both end surfaces of the iron core 14, respectively. A pair of terminal blocks 31 are formed. A plurality of projections 33 are formed on each terminal base 31 by a plurality of slits 32, and conductive pins 34 are provided on the outer surface of each projection 33.

Both ends of the winding of the coil 12 wound around the coil bobbin 13 are entangled with the pin 34 through the slit 32 and connected by soldering or the like.

The iron core 14 has a pair of E-shaped iron cores 35. Each of the E-shaped iron cores 35 has a base 36 which is engaged with an end face of the coil bobbin 13. A central leg core portion 37 engaged with the core insertion portion 21 is formed so as to protrude, and a pair of side leg core portions 38 engaged with both sides of the coil bobbin 13 from both sides of the base portion 36 are formed protruding. .

Next, the operation of the present embodiment will be described.

To assemble the electromagnetic device body 11, the coil 12 is wound around the coil bobbin 13 and the coil bobbin 13
A pair of E-shaped iron cores 35 of the iron core 14 are assembled from both end directions.

In order to incorporate each E-shaped iron core 35 into the coil bobbin 13, the center leg core 37 of each E-shaped iron core 35 is attached to the coil bobbin 13.
And a pair of side leg cores
38 is engaged with both sides of the coil bobbin 13. Each E-shaped iron core 35
The ends of the side leg cores 38 are butted together, and the butted portions are welded and fixed as necessary.

The base 36 of each E-shaped iron core 35 has a coil bobbin 13
Of the coil bobbin 13 and the outer surfaces of the flanges 23 and 24 at both ends of the coil bobbin 13.

Then, as shown in FIG.
Through the portion of the adhesive notch 26 of the pair of 13 engagement portions 25,
An adhesive 41 is applied between the pair of engaging portions 25 of the coil bobbin 13 and both end surfaces of the E-shaped iron core 35, and the coil bobbin 13 and the iron core 14 are bonded and fixed.

At this time, the adhesive notch 26 allows the adhesive
Since the application location of 41 can be easily confirmed, and the gap between the engaging portion 25 and the end face of the E-shaped iron core 35 is wide due to the adhesive notch 26, the adhesive 41 can be easily applied. Iron core
The adhesive 41 can be sufficiently applied without protruding onto the upper surface of the 35, and the adhesive area of the adhesive 41 to the end surface of the E-shaped iron core 35 increases, so that the coil bobbin 13 and the iron core 14 can be securely bonded and fixed. Furthermore, since the adhesive receiving portion 29 is defined by the plurality of ribs 28 corresponding to each of the bonding notches 26, the adhesive 41 that hangs outward from each of the bonding notches 26 is applied to the adhesive receiving portion 29. It can be received and accommodated and can be prevented from hanging outside.

Further, since the notch 26 for bonding is cut out only in a part of the engaging portion 25 of the coil bobbin 13, the engaging notch 26 has a smaller engagement amount than when the entire projecting amount of the engaging portion 25 from the flange portion 23 is reduced. A sufficient amount of engagement between the portion 25 and the end face of the iron core 14 can be ensured, and a decrease in engagement strength can be prevented.

In addition, engaging portions that engage with both end surfaces of the iron core 14
Since the notch 25 is formed and the notch 26 for bonding is formed in each engaging portion 25, the coil bobbin 13 and the iron core 14 can be more securely bonded and fixed, and can be easily coped with even when the adhesive 41 is applied in many places. .

[0029]

According to the first aspect of the present invention, the notch for applying the adhesive by exposing the end face of the iron core is formed in a part of the engaging portion of the coil bobbin. After securing a sufficient amount of engagement with the end face of the iron core, the adhesive can be easily applied to the end face of the iron core from the notch for bonding, and the adhesive area of the adhesive to the end face of the iron core increases, so that the coil bobbin and the iron core become larger. Can be securely bonded and fixed.

According to the electromagnetic device of the second aspect, in addition to the effect of the electromagnetic device of the first aspect, engaging portions for engaging with both end surfaces of the iron core are respectively formed, and each of the engaging portions is bonded. Since the cutout portion is formed, the coil bobbin and the iron core can be more securely bonded and fixed, and can be easily coped with even when the adhesive is applied in many places.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an electromagnetic device according to an embodiment of the present invention.

FIG. 2 is a front view of the electromagnetic device.

FIG. 3 is a front view of a conventional electromagnetic device.

[Explanation of symbols]

 12 Coil 13 Coil bobbin 14 Iron core 22 Winding part 23, 24 Flange 25 Engagement part 26 Notch part for bonding 41 Adhesive

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroshi Kubota 6-78, Minamicho, Mishima-shi, Shizuoka Inside Tec Mishima Plant

Claims (2)

[Claims] 1. An electromagnetic device comprising a coil, a coil bobbin around which the coil is wound, and an iron core into which the coil bobbin is inserted, wherein the coil bobbin and the iron core are fixed with an adhesive. A winding portion around which the coil is wound, a flange portion formed at both ends of the winding portion and partially protruding from an end surface of the core, and a flange portion protruding from an end surface of the iron core; An engagement portion to be engaged with an end surface of the iron core; and a notch portion for adhesion formed by cutting out a part of the engagement portion, exposing the end surface of the iron core and applying the adhesive. Electromagnetic equipment characterized by being. 2. The electromagnetic device according to claim 1, wherein the engaging portions are formed on flange portions protruding from both end surfaces of the iron core, and the notch for bonding is formed on each of the engaging portions.